Question

An equilateral triangular lamina of 25 mm sides lies with one of its edges on HP such that the surface of the lamina is inclined to HP at 60 deg. The edge on which it rests is inclined to VP at 60 deg. How many lines with 3 coordinates will appear during the projection?

(a) 5

(b) 6

(c) 3

(d) 2

I have been asked this question during an interview.

I want to ask this question from Projections of Planes in chapter Orthographic Projection, Projections of Lines, Planes and Solids of Civil Engineering Drawing

Answer 1

Right option is (d) 2

Easiest explanation: Lines above xy line i.e. a’b’(c’) representing lines are the required lines, refer the figure below.